<snip>

The seti@home website is down right now so I can't confirm this, but I think that the stock version of BOINC will only do regular workunits on the Nvidia GPU, not Astropulse.

Thanks for the info. That kind of sucks. I would infer, then, that in order to use CUDA, I have to
prevent seti from sending Astropulse units (per prior post) since those are the only ones it wants
to send.

Also, from what I've read, on a multi-core system one core will not run a workunit but will be "feeding" the CUDA GPU. Probably the same on a single core system; the CPU will be feeding the GPU.

Both CPU's are maxed out, so I guess that means no CUDA.

I'm still in the planning stages trying to figure out what I'll need to run CUDA units. So far it looks like a major upgrade.

I wanted a machine that could handle H.264-compressed hi-definition video via the Hauppague 1212
"PVR". This required a Dual-core CPU. A 45 watt CPU like the 2.5GHz AMD Athlon X2 4850e goes for
around $56. Likewise for the mobo. As soon as I upgraded the system, seti started loading me up with
Astropulse units, which take over a week to process.
I needed smoother video playback, so I picked up the GeForce 8400 for another $40 (less than I paid
in 1992 for the co-processor for my 386). I noticed in the literature that it supports CUDA, so I
thought I'd give it a try. Now I guess I will have to clear out these Asstropulse units before I can
try again.
Thanks.
Dave
    

</Tazz>

http://setiathome.berkeley.edu/forum_thread.php?id=52571

Read the first response to the question, I hope it helps a little. I'm still trying to wrap my head around how many CPUs and GPUs can run run what kind of workunits (MB or AP) together.

http://setiathome.berkeley.edu/forum_thread.php?id=51756  -a little help
http://setiathome.berkeley.edu/forum_thread.php?id=51621  -I haven't read all of this yet, my eyes are going crossed.